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The Scientific Method. HAVE YOU EVER EXPERIENCED THESE…. 6 Phases of a Project?. Enthusiasm Disillusionment Panic Search for the Guilty Punishment of the Innocent Praise and Honors for the Non-Participants. If you have experienced the 6 Phases of a Project…. The Scientific Method

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have you ever experienced these 6 phases of a project
  • Enthusiasm
  • Disillusionment
  • Panic
  • Search for the Guilty
  • Punishment of the Innocent
  • Praise and Honors for the Non-Participants
if you have experienced the 6 phases of a project
If you have experienced the 6 Phases of a Project…

The Scientific Method

can come to

your rescue!!!!!!!!!

learning objectives
Learning Objectives
  • TLW plan and implement investigative procedures including asking questions, formulating testable hypotheses, and selecting equipment and technology
  • TLW collect data and make measurements with precision
  • TLW organize, analyze, evaluate, make inferences, and predict trends data
  • TLW communicate valid conclusion
  • TLW analyze, review, and critique scientific explanations, including hypotheses, and theories, as to their strengths and weaknesses using scientific evidence and information
  • Chemistry TEKS 2.A., 2B, 2.C, 2.D, 2.E, 2.H, 2.I,3A.
  • Principles of Technology TEKS 3.A., 3.B, 3.C
  • What is Science?
  • Brief Overview of the Types of Science
  • The Scientific Method
    • Demonstrations, Comparisons, & Experiments
    • As Described Through Myth Busters & the Lesson of the Fishing Lure
    • The Paper and the Penny Experiment
  • Products of the Scientific Method
  • Review - Scientific Method Vocabulary, Process, and Parts of Experiments
  • Lab – Blowing Up a Balloon without Air
i what is science
I. What is Science

A. A process to answer questions

B. You use science everyday

C. It is an ever present

part of life

ii types of sciences
II. Types of Sciences

A. Physics

Study of forces and energy

B. Chemistry

Study of matter and its changes

C. Biology

Study of living things

D. Earth Science

Study of the earth; geology, meteorology,

astronomy, etc

  • The MythBusters guys comment on the scientific method

Link to

iii the scientific method
III. The Scientific Method

A. Steps to follow to solve or understand problems

B. The Steps

1. Problem – observe a problem or something interesting

* Formulate a question –

  • ask “how” or “why”
  • must be specific

Ex. Why does the silver lure catch more fish?

2. Research: find out as much information;

Answer pre-lab questions

3. Form a hypothesis – predict an answer to the problem

*must be in, “IF…, then…” format (Ex. If the silver lure is used, then more fish will be caught)

*Hypothesis must be testable

ways of discovery
Ways of Discovery
  • Demonstrations – simpler scientific method used to show or confirm facts
    • For example: determine the density of a block of wood
  • Comparisons – scientific method to evaluate samples for likenesses and differences
    • For example: determine which is more dense a block of cypress, oak, or teak wood
  • Experiments – more rigorous test. See next slide
4. Experiment - Test the hypothesis

a. Experiments should be conducted at least 3 times

for repeatable, better data

b. Parts to the experiment:

1) control – part of the experiment that has no variables (Ex. Use a lure with no color to catch fish)

2) independent variable - the factor that you can change

Ex. change the color of the lure

- CHANGE ONE Variable at a time

3) dependent variable – what you can measure

Ex. The number of fish caught

4) Ex. of experiment parts:

If oil is added to a door hinge, then the door will not squeak.

control – not adding oil

independent variable – oil

dependent variable – the squeak

  • Change onlyone independent variable at a time
  • Otherwise…. You won’t know which one impacted the dependent variable
  • (Ex. Changing the color of the lure and the type of string)
use the information in the table to answer the questions
Use the information in the table to answer the questions:

1. What is the independent variable?

Answer: gibberellin

2. What is the dependent variable?


3. Which group is the control group?

Answer: Group1-no gibberellin added

5. Data and analysis: Observe and collect data from the experiment.
  • Analyze the data and organize it using tables, charts, graphs

6. Form a conclusion –

  • Determine an answer from data analysis

Ex. - The silver lure caught the most fish

  • Maybe find a newproblem

-- Which lure caught the biggest fish?

  • Answer post-lab questions
  • May include written and/or oral reports




A predicted solution to a problem that is testable c



iv products of scientific method
IV. Products of Scientific Method

A. Theory

1. A logical explanation of events that happen in nature

2. A theory has been tested

3. A theory is a possible explanation

4. A theory is not 100%

B. A law

1. A theory that has been tested many times and is accepted as true

2. a summaryof an observed natural event

3. Not necessarily 100%, accepted - but never proven wrong

review what we ve learned
Review What We’ve Learned
  • Independent Practice
    • Science Word Search
    • Planning Investigations Worksheet
  • Together the class will review the steps to the lab
  • Discuss potential hazards, precautions, and PPE
  • Divide into Periodic Groups and work in teams to complete experiment
  • Complete lab guide
  • Turn in completed lab guides by teams
  • Discuss findings